title: Determination of prostaglandin E(2) by on-line solid-phase extraction-liquid chromatography with ultraviolet detection for microsomal prostaglandin E(2) synthase-1 inhibitor screening.
abstract: A rapid, robust and selective on-line solid-phase extraction-liquid chromatographic method with ultra-violet detection (on-line SPE-LC-UV) for microsomal prostaglandin E(2) synthase-1 (mPGES-1) inhibitor screening was developed and validated. Disrupted A549 cells were used as mPGES-1 source and the formation of prostaglandin E(2) (PGE(2)) out of the substrate prostaglandin H(2) (PGH(2)) was determined at 195 nm. Direct on-line sample clean up was achieved by automated column switch (C18 trap column) prior isocratic separation using a C18 analytical column. The on-line SPE-LC-UV method was accurate, precise and reproducible in the range of 71-1763 ng/ml for PGE(2) and met the generally accepted criteria for bioanalytical methods. The method was successfully applied to determine the IC(50) value of the known mPGES-1 inhibitor NS-398.
authors.affiliation: Institute of Pharmaceutical and Medicinal Chemistry, University of Münster, Hittorfstrasse 58-62, D-48149 Münster, Germany. jfabian@uni-muenster.de
authors.forename: Jörg
authors.initials: J
authors.lastname: Fabian
mesh_terms: D000527:Alprostadil / Q000032:analysis; D045744:Cell Line, Tumor; D002853:Chromatography, Liquid / Q000379:methods*; D016861:Cyclooxygenase Inhibitors / Q000494:pharmacology*; D015232:Dinoprostone / Q000032:analysis* / Q000378:metabolism; D004353:Drug Evaluation, Preclinical / Q000379:methods*; D006801:Humans; D020128:Inhibitory Concentration 50; D019746:Intramolecular Oxidoreductases / Q000037:antagonists & inhibitors* / Q000378:metabolism; D007700:Kinetics; D008861:Microsomes / Q000201:enzymology; D009578:Nitrobenzenes / Q000494:pharmacology; D044262:Prostaglandin H2 / Q000378:metabolism; D000071876:Prostaglandin-E Synthases; D012015:Reference Standards; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D052616:Solid Phase Extraction / Q000379:methods*; D013449:Sulfonamides / Q000494:pharmacology
chemical_list: D016861:Cyclooxygenase Inhibitors; D009578:Nitrobenzenes; D013449:Sulfonamides; C080955:N-(2-cyclohexyloxy-4-nitrophenyl)methanesulfonamide; D044262:Prostaglandin H2; D019746:Intramolecular Oxidoreductases; C000605862:PTGES protein, human; D000071876:Prostaglandin-E Synthases; D000527:Alprostadil; D015232:Dinoprostone